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Question

If 10 is added to four times a certain number the result is 5 less than five times the number. The number is

A
10
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B
15
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C
20
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D
25
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Solution

The correct option is A 15
Let the number be x.
According to given condition, we have
4x+10=5x5
Putting x terms to one side and constants to another side, we have
10+5=5x4x
x=15
Therefore, the number is 15.

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